Question

I know there must be 100 ways to do this – but can someone recommend the ‘best/most simple’ method to check if three integer variables are within one point of each other.

$a = 1; $b = 2; $c = 1;

As each var is within 1 point of each other the formula required should return TRUE;

Can anyone suggest the best functions/method to do this. Thanks in advance

Answer 1

Thought i’d go the extra mile here

function scope_check()
{
    // usage: bool scope_check(mixed $range, mixed $val1 [, mixed $val2 [,mixed $...]])
    $array=func_get_args();
    if(sizeof($array)<=1) return false;
    $range=array_shift($array);

    $max=max($array);
    $min=min($array);

    if($max-$min<=$range) return true;
    return false;
}

$valid=scope_check(1, -10, -11, -12, 4, 5 ,7);
if($valid) echo 'valid'; else echo 'not valid';